1. School of Social Sciences and Psychology, Western Sydney University, Sydney, New South Wales 2751, Australia
2. Marcs Institute for Brain and Behaviour, Western Sydney University, Sydney, New South Wales 2751, Australia
3. L-3 Communications Link Simulation and Training, Dayton, OH 07102, USA
4. Psychogeriatric Research Center, Institute of Psychiatry, Faculty of Medicine, Ain Shams University, Cairo 10021, Egypt